<script setup>
import { ref, onMounted } from 'vue'

const props = defineProps({
  width: {
    type: Number,
    default: 400
  },
  height: {
    type: Number,
    default: 350
  },
  data: {
    type: Array,
    default: () => []
  }
})
// 传入数据生成 option

const color = [
  {
    color: 'rgba(0, 126, 255, 1)'
  },
  {
    color: 'rgba(251, 179, 8, 1)'
  },
  {
    color: 'rgba(141, 213, 251, 1)'
  }
]
const dataList = props.data.map((item, index) => {
  return {
    name: item.name,
    val: item.val, //存储数据的地方
    itemStyle: color[index]
  }
})
const heightProportion = 0.12 // 柱状扇形的高度比例

// 生成扇形的曲面参数方程，用于 series-surface.parametricEquation
function getParametricEquation(startRatio, endRatio, isSelected, isHovered, k, height) {
  // 计算
  let midRatio = (startRatio + endRatio) / 3

  let startRadian = startRatio * Math.PI * 2
  let endRadian = endRatio * Math.PI * 2
  let midRadian = midRatio * Math.PI * 2

  // 如果只有一个扇形，则不实现选中效果。
  if (startRatio === 0 && endRatio === 1) {
    isSelected = false
  }

  // 通过扇形内径/外径的值，换算出辅助参数 k（默认值 1/3）
  k = typeof k !== 'undefined' ? k : 1 / 3

  // 计算选中效果分别在 x 轴、y 轴方向上的位移（未选中，则位移均为 0）
  let offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0
  let offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0

  // 计算高亮效果的放大比例（未高亮，则比例为 1）
  let hoverRate = isHovered ? 1.1 : 1

  // 返回曲面参数方程
  return {
    u: {
      min: -Math.PI,
      max: Math.PI * 3,
      step: Math.PI / 32
    },

    v: {
      min: 0,
      max: Math.PI * 2,
      step: Math.PI / 20
    },

    x: function (u, v) {
      if (u < startRadian) {
        return offsetX + Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate
      }
      if (u > endRadian) {
        return offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate
      }
      return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate
    },

    y: function (u, v) {
      if (u < startRadian) {
        return offsetY + Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate
      }
      if (u > endRadian) {
        return offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate
      }
      return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate
    },

    z: function (u, v) {
      if (u < -Math.PI * 0.5) {
        return Math.sin(u)
      }
      if (u > Math.PI * 2.5) {
        return Math.sin(u)
      }
      return Math.sin(v) > 0 ? heightProportion * height : -1
    }
  }
}

// 生成模拟 3D 饼图的配置项
function getPie3D(pieData, internalDiameterRatio) {
  let series = []
  let sumValue = 0
  let startValue = 0
  let endValue = 0
  let legendData = []
  let linesSeries = [] // line3D模拟label指示线
  let k = typeof internalDiameterRatio !== 'undefined' ? (1 - internalDiameterRatio) / (1 + internalDiameterRatio) : 1 / 3

  // 为每一个饼图数据，生成一个 series-surface 配置
  for (let i = 0; i < pieData.length; i++) {
    sumValue += pieData[i].value

    let seriesItem = {
      name: typeof pieData[i].name === 'undefined' ? `series${i}` : pieData[i].name,
      type: 'surface',
      parametric: true,
      wireframe: {
        show: false
      },
      pieData: pieData[i],
      pieStatus: {
        selected: false,
        hovered: false,
        k: k
      }
    }

    if (typeof pieData[i].itemStyle != 'undefined') {
      let itemStyle = {}

      typeof pieData[i].itemStyle.color != 'undefined' ? (itemStyle.color = pieData[i].itemStyle.color) : null
      typeof pieData[i].itemStyle.opacity != 'undefined' ? (itemStyle.opacity = pieData[i].itemStyle.opacity) : null

      seriesItem.itemStyle = itemStyle
    }
    series.push(seriesItem)
  }

  // 使用上一次遍历时，计算出的数据和 sumValue，调用 getParametricEquation 函数，
  // 向每个 series-surface 传入不同的参数方程 series-surface.parametricEquation，也就是实现每一个扇形。
  for (let i = 0; i < series.length; i++) {
    endValue = startValue + series[i].pieData.value
    // console.log(series[i]);
    series[i].pieData.startRatio = startValue / sumValue
    series[i].pieData.endRatio = endValue / sumValue
    series[i].parametricEquation = getParametricEquation(series[i].pieData.startRatio, series[i].pieData.endRatio, false, false, k, series[i].pieData.value)

    startValue = endValue

    // 计算label指示线的起始和终点位置
    let midRadian = (series[i].pieData.endRatio + series[i].pieData.startRatio) * Math.PI
    let posX = Math.cos(midRadian) * (1 + Math.cos(Math.PI / 2))
    let posY = Math.sin(midRadian) * (1 + Math.cos(Math.PI / 2))
    let posZ = Math.log(Math.abs(series[i].pieData.value + 1)) * 0.3
    let flag = (midRadian >= 0 && midRadian <= Math.PI / 2) || (midRadian >= (3 * Math.PI) / 2 && midRadian <= Math.PI * 2) ? 1 : -1
    let color = pieData[i].itemStyle.color
    let turningPosArr = [posX * 1.8 + i * 0.1 * flag + (flag < 0 ? -0.5 : 0), posY * 1.8 + i * 0.1 * flag + (flag < 0 ? -0.5 : 0), posZ * 2]
    let endPosArr = [posX * 1.9 + i * 0.1 * flag + (flag < 0 ? -0.5 : 0), posY * 1.9 + i * 0.1 * flag + (flag < 0 ? -0.5 : 0), posZ * 6]

    linesSeries.push(
      {
        type: 'line3D',
        lineStyle: {
          color: `rgba(255, 255, 255, 0.3)`
        },
        data: [[posX, posY, posZ], turningPosArr, endPosArr]
      },
      {
        type: 'scatter3D',
        label: {
          show: true,
          distance: 0,
          position: 'center',
          textStyle: {
            backgroundColor: 'transparent',
            borderWidth: 2,
            padding: 10,
            borderRadius: 4
          },
          rich: {
            name: {
              fontFamily: 'sr',
              color: 'rgba(155, 164, 187, 1)',
              fontSize: '16rem'
            },
            value: {
              fontFamily: 'dt',
              color: '#fff',
              fontSize: '19rem'
            }
          },
          formatter: function (params) {
            const [name, value] = params.name.split('\n')
            // 类似HTML的<div>结构，使用富文本标记
            return [
              `{name|${name}}`, // 对应第一个<div class="fs-16 gray">
              `{value|${value}}` // 对应第二个<div class="fs-19 dt">
            ].join('\n') // 换行模拟div的块级效果
          }
        },
        symbolSize: 0,
        data: [{ name: series[i].name + '\n' + series[i].pieData.val, value: endPosArr }]
      }
    )

    legendData.push(series[i].name)
  }
  series = series.concat(linesSeries)

  // 最底下圆盘
  series.push({
    name: 'mouseoutSeries',
    type: 'surface',
    parametric: true,
    wireframe: {
      show: false
    },
    itemStyle: {
      opacity: 0.9,
      color: 'rgba(16, 77, 140, 1)'
    },
    parametricEquation: {
      u: {
        min: 0,
        max: Math.PI * 2,
        step: Math.PI / 20
      },
      v: {
        min: 0,
        max: Math.PI,
        step: Math.PI / 20
      },
      x: function (u, v) {
        return ((Math.sin(v) * Math.sin(u) + Math.sin(u)) / Math.PI) * 2
      },
      y: function (u, v) {
        return ((Math.sin(v) * Math.cos(u) + Math.cos(u)) / Math.PI) * 2
      },
      z: function (u, v) {
        return Math.cos(v) > 0 ? -0 : -1.5
      }
    }
  })
  // 补充一个透明的圆环，用于支撑高亮功能的近似实现。
  series.push({
    name: 'mouseoutSeries',
    type: 'surface',
    parametric: true,
    wireframe: {
      show: false
    },
    itemStyle: {
      opacity: 0.1,
      color: '#008fff'
    },
    parametricEquation: {
      u: {
        min: 0,
        max: Math.PI * 2,
        step: Math.PI / 20
      },
      v: {
        min: 0,
        max: Math.PI,
        step: Math.PI / 20
      },
      /** 圆环位置 xyz */
      x: function (u, v) {
        return ((Math.sin(v) * Math.sin(u) + Math.sin(u)) / Math.PI) * 2.3
      },
      y: function (u, v) {
        return ((Math.sin(v) * Math.cos(u) + Math.cos(u)) / Math.PI) * 2.3
      },
      z: function (u, v) {
        return Math.cos(v) > 0 ? -1 : -2
      }
    }
  })
  return series
}

let total = 0
dataList.forEach(item => {
  total += item.val
})
const series = getPie3D(
  dataList.map(item => {
    item.value = Number(((item.val / total) * 100).toFixed(2))
    return item
  }),
  0.8,
  240,
  28,
  26,
  1
)

// 准备待返回的配置项，把准备好的 legendData、series 传入。
const option = {
  legend: {
    tooltip: {
      show: true
    },
    data: dataList.map(item => item.name),
    bottom: '0%',
    left: 'center',
    icon: 'circle',
    itemWidth: 11, // 可单独设置图例列表中图标的宽度:cite[1]:cite[4]
    itemHeight: 11, // 可单独设置图例列表中图标的高度:cite[1]:cite[4]
    textStyle: {
      color: '#fff',
      fontSize: '16rem'
    }
  },
  animation: true,
  backgroundColor: 'transparent',
  labelLine: {
    show: true,
    lineStyle: {
      color: '#7BC0CB'
    }
  },
  label: {
    show: false
  },
  xAxis3D: {
    min: -1.5,
    max: 1.5
  },
  yAxis3D: {
    min: -1.5,
    max: 1.5
  },
  zAxis3D: {
    min: -1,
    max: 1
  },
  grid3D: {
    show: false,
    boxHeight: 4,
    bottom: '50%',
    viewControl: {
      distance: 180,
      alpha: 25,
      beta: 60,
      autoRotate: true // 自动旋转
    }
  },

  series: series
}

const echart = ref()

onMounted(() => {
  const e = echarts.init(echart.value)
  e.setOption(option)
})
</script>

<template>
  <div
    ref="echart"
    :style="{
      width: width + 'rem',
      height: height + 'rem'
    }"
  ></div>
</template>
